Colour:Black Regarding the use period of the mask: The mask can be used for at least 2 years. The filter is recommended to be replaced every 30 days. Frequent or severe haze areas, depending on the situation, (the filter becomes black or damaged, please replace it in time)feature:& Breathable, durable, mesh mask shell; inner cover material: non-woven fabric, activated carbon& Aluminum Adjustable Nose Clip& Earhook Design& Adjustable Velcro Strap& Double Check ValvePackage Contents:● 1 grid mask (with auxiliary valve and filter)advantage:✔ 99% of dust, chemicals, smoke and particles separated by activated carbon filter✔ The grid mask shell is great for warm environments as it allows maximum ventilation to your skin while holding the filters and valves in place✔ Adjustable nose clip helps ensure a 360-degree seal to avoid lens fogging✔ Hanging spike design keeps the mask from slipping✔ Adjustable Velcro strap for perfect fit. Easy on, easy off✔ The double one-way exhaust valve exhales and does not heat up the inner side cover✔ Mesh dust mask housing and valve can be washed when they get dirty, the filter N99 is replaceable.
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